The Reactions and Energetics of Organic Radical Ions in Solution

溶液中有机自由基离子的反应和能量

• 批准号: 9708935
• 负责人: Vernon Parker
• 金额: $ 34.8万
• 依托单位: Utah State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-07-01 至 2000-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9708935&HistoricalAwards=false
• 关键词: Reactions; Energetics; Organic; Radical; Ions

With the support of the Organic Dynamics Program, Professor Vernon D. Parker studies the reactions and energetics of organic radical ions in solution. Professor Parker, of the Department of Chemistry at Utah State University, addresses the influence of coupling between charge and radical centers on the reactivity of one or both of these centers. For example, dimerization rates of arene radical cations are greatly enhanced by methoxy and N,N-dimethylamino substituents which separate the charge and radical centers. Kinetic support for the hypothesis of a correlation between reactivity and extent of coupling is sought through study of radical ions with varying degrees of spin-charge coupling. Professor Vernon D. Parker, of the Department of Chemistry at Utah State University, is supported by the Organic Dynamics Program for his studies of the factors influencing the reactivity of a class of compounds known as radical ions. These compounds, which contain an atom bearing a positive or negative charge (an ion) as well as an atom bearing one less electron than ordinarily found (a radical), often display reactivity distinct from that of a molecule containing only one of these structural elements (radical or ion). Professor Parker is exploring the hypothesis that atomic or molecular groups intervening between the radical and ion centers influence the reactivity of these centers, with those groups providing the greatest `coupling` leading to the most dramatic alteration of reactivity. Radicals and ions appear as important intermediates in a wide variety of chemical and biochemical systems and are additionally significant in areas such as radiation chemistry and toxicology. Professor Parker's studies are leading to the development of a more fundamental understanding of those factors influencing the chemical properties of these important species.

在有机动力学项目的支持下，弗农D. 帕克研究了有机自由基离子的反应和能量， 溶液 犹他州化学系的帕克教授 大学，地址之间的电荷和耦合的影响， 自由基中心取决于这些中心中的一个或两个的反应性。 为 例如，芳烃自由基阳离子的二聚速率大大提高 被甲氧基和N，N-二甲基氨基取代基隔开电荷 激进的中心。 相关性假说的动力学支持 反应性和耦合程度之间的关系是通过研究 具有不同程度的自旋-电荷耦合的自由基离子。 弗农教授D.犹他州化学系的帕克说， 他的研究得到了有机动力学项目的支持 影响一类已知化合物反应性的因素 作为自由基离子。 这些化合物含有一个带有 正电荷或负电荷（离子）以及少带一个电荷的原子 电子比通常发现的（自由基），经常显示反应性 不同于仅含有这些结构中的一个的分子的结构 元素（自由基或离子）。 帕克教授正在研究 原子团或分子团介于自由基和离子之间 中心会影响这些中心的反应性， 提供最大的“耦合”，导致最戏剧性的改变 反应性。 自由基和离子是一种重要的中间体， 广泛的化学和生物化学系统，另外， 在辐射化学和毒理学等领域具有重要意义。 帕克教授的研究正在导致一种更 对影响化学品的因素的基本了解 这些重要物种的特性。